Disable gyptest-link-dependency.py for cmake, make it pass with ninja/win

test/link-dependency/mymalloc.c

Index: test/link-dependency/mymalloc.c
===================================================================
--- test/link-dependency/mymalloc.c	(revision 1864)
+++ test/link-dependency/mymalloc.c	(working copy)
@@ -1,4 +1,11 @@
 #include <stdlib.h>
+
+// The windows ninja generator is expecting an import library to get generated,
+// but it doesn't if there are no exports.
+#ifdef _MSC_VER
+__declspec(dllexport) void foo() {}
+#endif
+
 void *malloc(size_t size) {
   return (void*)0xdeadbeef;
 }